September 28 - 30, 2018

Grokking Generics

Sunday - Sep 30 4:00 PM
- WAYLAND

Daniel Hinojosa

Independent Consultant/Developer

For those still grappling with Generics? This will be an attempt to clear the air about generics. What are wildcards? What is extends? What is super? What is covariance? What is contravariance? What is invariance? What is erasure? Why and when do I need this?

One of the more pain items in any statically typed language on the JVM is generics or parameterized type. This presentation is set to overcome some of these hurdles and understand some of these terms that often vex us. We will cover:

Covariance

Contravariance

Invariance

Erasure

Generic Assignments

Weird Generic Funky Stuf

Use-Site vs Declaration-Site Variance

Differences Java vs. Scala vs. Kotlin

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About Daniel Hinojosa

Daniel is a programmer, consultant, instructor, speaker, and recent author. With over 20 years of experience, he does work for private, educational, and government institutions. He is also currently a speaker for No Fluff Just Stuff tour. Daniel loves JVM languages like Java, Groovy, and Scala; but also dabbles with non JVM languages like Haskell, Ruby, Python, LISP, C, C++. He is an avid Pomodoro Technique Practitioner and makes every attempt to learn a new programming language every year. For downtime, he enjoys reading, swimming, Legos, football, and barbecuing.